1 /* 2 * userio: virtual serio device support 3 * Copyright (C) 2015 Red Hat 4 * Copyright (C) 2015 Lyude (Stephen Chandler Paul) <cpaul (at) redhat.com> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU Lesser General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 13 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more 14 * details. 15 * 16 * This is the public header used for user-space communication with the userio 17 * driver. __attribute__((__packed__)) is used for all structs to keep ABI 18 * compatibility between all architectures. 19 */ 20 21 #ifndef _USERIO_H 22 #define _USERIO_H 23 24 #include <linux/types.h> 25 26 enum userio_cmd_type { 27 USERIO_CMD_REGISTER = 0, 28 USERIO_CMD_SET_PORT_TYPE = 1, 29 USERIO_CMD_SEND_INTERRUPT = 2 30 }; 31 32 /* 33 * userio Commands 34 * All commands sent to /dev/userio are encoded using this structure. The type 35 * field should contain a USERIO_CMD* value that indicates what kind of command 36 * is being sent to userio. The data field should contain the accompanying 37 * argument for the command, if there is one. 38 */ 39 struct userio_cmd { 40 __u8 type; 41 __u8 data; 42 } __attribute__((__packed__)); 43 44 #endif /* !_USERIO_H */ 45
